Re: [PATCH v2] PCI: Re-enable downstream port LTR if it was previously enabled

2021-01-26 Thread Mingchuang Qiao
On Fri, 2021-01-22 at 07:20 -0600, Bjorn Helgaas wrote: > On Fri, Jan 22, 2021 at 03:03:11PM +0800, Mingchuang Qiao wrote: > > On Thu, 2021-01-21 at 16:31 -0600, Bjorn Helgaas wrote: > > > [+cc Alex and Mingchuang et al from > > >

Re: [PATCH v2] PCI: Re-enable downstream port LTR if it was previously enabled

2021-01-22 Thread Bjorn Helgaas
On Fri, Jan 22, 2021 at 03:03:11PM +0800, Mingchuang Qiao wrote: > On Thu, 2021-01-21 at 16:31 -0600, Bjorn Helgaas wrote: > > [+cc Alex and Mingchuang et al from > > https://lore.kernel.org/r/20210112072739.31624-1-mingchuang.q...@mediatek.com] > > > > On Tue, Jan 19, 2021 at 04:14:10PM +0300,

Re: [PATCH v2] PCI: Re-enable downstream port LTR if it was previously enabled

2021-01-22 Thread Mika Westerberg
Hi, On Fri, Jan 22, 2021 at 03:03:11PM +0800, Mingchuang Qiao wrote: > On Thu, 2021-01-21 at 16:31 -0600, Bjorn Helgaas wrote: > > [+cc Alex and Mingchuang et al from > > https://lore.kernel.org/r/20210112072739.31624-1-mingchuang.q...@mediatek.com] > > > > On Tue, Jan 19, 2021 at 04:14:10PM

Re: [PATCH v2] PCI: Re-enable downstream port LTR if it was previously enabled

2021-01-21 Thread Mingchuang Qiao
On Thu, 2021-01-21 at 16:31 -0600, Bjorn Helgaas wrote: > [+cc Alex and Mingchuang et al from > https://lore.kernel.org/r/20210112072739.31624-1-mingchuang.q...@mediatek.com] > > On Tue, Jan 19, 2021 at 04:14:10PM +0300, Mika Westerberg wrote: > > PCIe r5.0, sec 7.5.3.16 says that the downstream

Re: [PATCH v2] PCI: Re-enable downstream port LTR if it was previously enabled

2021-01-21 Thread Bjorn Helgaas
[+cc Alex and Mingchuang et al from https://lore.kernel.org/r/20210112072739.31624-1-mingchuang.q...@mediatek.com] On Tue, Jan 19, 2021 at 04:14:10PM +0300, Mika Westerberg wrote: > PCIe r5.0, sec 7.5.3.16 says that the downstream ports must reset the > LTR enable bit if the link goes down (port